Acidic Mist

A thick billowing cloud of acidic mist appears in a 20-foot emanation centered on a point within range. This mist lasts for the duration or until a wind of moderate or greater speed (at least 10 miles per hour) disperses it.

When the mist appears, each creature in it must make a Constitution saving throw. A creature takes 3d6 acid damage on a failed save, or half as much damage on a successful one. A creature must also make this saving throw when it enters the spell's area for the first time on a turn or ends its turn there.

The mist moves 10 feet directly away from you in a direction that you choose at the start of each of your turns.